The correct option is D One egg cell and the two synergids
The embryo sac is made up of 7 cells- 2 synergids, 1 egg cell, 3 antipodal cells and 1 central cell. Three cells are present together at the micropylar end These three cells are the two synergids and the egg cell. They are together referred to as the egg apparatus. The two polar nuclei present inside the central cell and the antipodal cells are not part of the egg apparatus.